explicitly inform the user why apt-transport-https or apt-transport-tor are getting installed

mmdebstrap

@@ -2295,6 +2295,8 @@ sub run_install() {
               or error "cannot start apt-get indextargets: $!";
             while (my $uri = <$pipe_apt>) {
                 if ($uri =~ /^https:\/\//) {
+                    info "https mirror found -- adding apt-transport-https "
+                      . "and ca-certificates";
                     # FIXME: support for https is part of apt >= 1.5
                     push @pkgs_to_install_from_outside, 'apt-transport-https';
                     push @pkgs_to_install_from_outside, 'ca-certificates';
@@ -2302,6 +2304,7 @@ sub run_install() {
                 } elsif ($uri =~ /^tor(\+[a-z]+)*:\/\//) {
                     # tor URIs can be tor+http://, tor+https:// or even
                     # tor+mirror+file://
+                    info "tor mirror found -- adding apt-transport-tor";
                     push @pkgs_to_install_from_outside, 'apt-transport-tor';
                     last;
                 }